Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b15708329c8816aaf458466259c226ffe88572b950894a71451f34e1d02b598' 
  AND token = 'hEVTADz36g3KNdmlc9n6spSAwZ8/a72VCLc5nsEazYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}